An example of an ASTM Steel specification that discusses thickness and tolerance is: A513, titled: Standard Specification for Electric-Resistance-Welded
Carbon and Alloy Steel Mechanical Tubing.
This specification covers chemistry, dimensional, and surface specification.
Nick
Ahh.. The Crimp vs Solder debate... As a metallurgist and live sound engineer I have often been interested in this debate.
In live sound a common and critical connection is the MASS connector, W4 MASS, this connector contains 176 pins/sockets in a very high density connector. It also sees a...
Almost all ferrous materials are magnetic (will stick to a magnet)
The only reason to use stainless is if you need the corrosion resistance, otherwise you are just adding unnecessary costs.
Grey Cast Iron is a pretty good choice if you're looking for long term dimensional stability during use...
Heat treat for Oil or Air hardening tool steels is going to be on the order of dollars/hundreds -- independent of the material choice a go/no go at .0005" is going to have to be ground, your largest cost for producing your gauge. What is the basic diameter?
Pre-Hardened drill rod can work...
O1, A2, work well. You want a material that is very abrasion resistant. This normally requires a hardened steel. Alternately I guess you could use an alloy steel and carburize it.
either way 17-4PH is soft and rather expensive for the job.
Nick
we are setting up a new (used) lathe, it's a FEMCO DURGA-25E
We will be using it for production machining of 4130 DOM tubing, using coated carbide tooling.
What coolant would you use and why?
some obvious things that we would prefer
Compatible with the workpiece, tooling, and machine.
Low...
for a mechanical engineer this should be pretty easy, a couple levers and a screw.
are you sure you're a mechanical engineer? this forum (Eng-Tips) is for working, real engineers.
Nick
you are going to have a tough time, as Mike said, you're looking at a job description that normally would encompass a large number of different people.
You must know how to manufacture things to design new products and see them through the prototype, beta, and into production. In fact for the...
I'm looking for information and descriptions of the maths for calculating the forces required to permanantly bend tubing using a fixed die and rolling wiper. Anyone have any suggestions for this metallurgist who's a bit out of his element?
I can post a schematic of the machine in a bit if that...
There are casting alloys, and wrought alloys. Each one has chemistry suitable for the processing to be used, A356 aluminium can be cast and heat treated to relatively high strength levels.
here's a link to an industry body that can get you way more accurate information than wiki...
Neither;
4140 and 4340 have the same modulus, they will deflect the same amount under load.
IE: if it's a square plate with 75,000lbs in the exact center, and restrained at the edges, will see the most deflection in the dead center, and the least at the restraints.
Nick
What about cooling rate?
If the heated molds did better, by being dryer, there was also a cooling rate difference. Does the mold with the 50% silica in the matrix cool slower than the one without the 50% silica? or faster? What is the thermal mass effect of replacing RTV Silicone with Silica...
Berkshire is completely right. The print is not the cut path, the print is what the actual part should be sized to after it's manufactured. It is the operator/path creators job to adjust the offset so that parts can be made that meet the print specifications.
There are plenty of reasons why...
